Thermostatic control device for explosive-engines.



C. P. BYRNES.

THERMOSTATC CONTROL DEVICE FOR EXPLOSIVE ENGINES.

' APPLICATION min APR. 2. m5.

1 ,1 89,786 Patented Jully 4, 1916.

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INVENTOFI mostat may, however, be connected to and UNITED STATES PATEN T OFFICE.

CLARENCE P. BYRNESK, OF SEWICKLEY, PENNSYLVANIA.

y THERMOSTATIC CONTROL DEVICE FOR EXPLOSIVE-ENGINES.

To all whom it may concern Be it known that I, CLARENCE P. BrnNEs, a citizen of the United States, residing at Sewickley, in the county of Allegheny and `State of Pennsylvania, have invented a new land useful Improvement in Thermostatic Control Devices for Explosive-Engines, of which the following is a full, clear, and ex act description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a diagrammatic sectional view showing one form of my invention; Fig. 2 is a similar view showing the thermostatic throttle heated and opened; Figs. 3 and 4 are diaglgammatic views showing modified forms; and Fig. 5 shows the device placed in the water channel from the radiator to the engine. v

My invention relates to explosive engines, particularly those using a carbureter, though it may be applied to others. With such engines, a greater proportion of fuel in the mixture is desired for starting them under running conditions, and various devices have been used to accompllsh this: for example, speclal starting feeds, thermostatic control -of the carbureter needle valve; yauxiliarystarting carbureters, etc. Moreovelyin a simple jet carbureter, 'the mixture grows richer under increasing suction of the engine, and special devices, ysuch as auxiliary spring-controlled air valves,` dividing the vfuel feed, feeding a portion by gravity, etc.,

have been used to lremedy this. y

My inventionis designedv to provide a richer mixture for easyvstarting, by thermostatic heat control lof the air sucked in by the engine, this being preferably7 the main air passing to the charge former or mixer, though it may control an auxiliary air valve which supplies further air for the mixture. It also tends to correct the undesirable formation of a richer mixture as the suction increases; and may' be 0f simple cheap construction. A l In the preferred form, the thermostat is controlled by the heat of the engine exhaust and is not only a thermostat, but also has a valve function, this being obtained by locating a part of the,theimos'tat in the air inlet or mixture inlet How passage. The theroperate a valve device controlling the air supply or a part thereof. In the drawings, referring to the'form of Specification of Letters Patent.

- of fingers.

Figs. l and 2, 2 represents the exhaust pipe or manifold of an explosive engine, and 3 the air inlet pipe leading to the carbureter or charge former. 4 is the thermostat which in this form isa cone of thermostatic material, such as two dissimilar metals soldered or secured together and split to form a series When cold, these fingers are relatively close together, ,with the slits between of relatively Small size. This cone is secured within an air inlet passage 5, exs tending through the exhaust pipe or manifold and leading to the main air inlet pipe 8. The cone may be secured in contact with the Awall of the passage or may have portions projecting through it into contact with the hot exhaust gases. When the parts are cold,

this thermostatic valve Will choke down the air suckedin during starting and thus give a richY mixture. As the engine starts and the exhaust gases heat up the exhaust channel, the fingers Will expandas shown in Fig.

2, thus increasing the air supply and afording a proper mixture during normal running. The area of airI inlet is thus dependent on the temperature of the airtand' the temperature and volume of the exhaust gases. The device`therefore also tends to correct the enriching of the mixture under `higher suctions, giving a heat control ofthe mixture. If a pressure-controlled type of carbureter is used having a piston or equivalent device, the combination will give both automatic pressure and automatic heat con- -in the air flow suction channel 5b.

In all these forms, the air suction channel crosses over from the carbureter side of the Yengine to the exhaust side, to bring the air control and` thermostat into proximity. In the bar forni, amplifying connections, such as multiplying levers, may be interposed between the thermostats and the valve or choke device to give a greater movement of the latter, if desired.

p Patented July 4, 1916. Application filed April 2, 1915. Serial No. 18,743.

The simple form of Figs. 1 and 2 may also temperature, the thermostatic cone should f be made of such metals and so` arranged as to give it greater movement through such range. In this relation, the thermostatic valve device may control either the main Water flow connection or4 a bypass may be provided through which the Water may How `without passing to the radiator, the thermostat controlling the yrelative currents of flow through each by its size of opening relative to the bypass opening.

The advantages of myinvention will be apparent to those skilled in the art, since a simple, cheap and easily applied device is most eilicient temperature.

-ai'orded which cwill automatically heat-control the air -supply to the charge former', giving easy starting and tending to reduce ever-richness of the mixture onI greater suctions when more air is needed. As a `Water control, it tends to keep the enginey a'tts The form of the thermostat may be varied; adjustments may be vused between and the valve, when the latter is used; its

connections maybe changed; it may lbe heated by the engine cylinder or vheated parts connected thereto, and other changes may be made without departing from my 1n vention.

I claim:

1. An explosive engine having a fuel inlet pipe provided with a charge former and an air inlet through which air is continuously sucked by the engine While running,

. and a thermostatic device adjacent to the engine exhaust and in conductive heat relation theretov additionallyv to any heating thereof from the air drawn in and arranged to control at all times* the volume of air :sucked in 'through said air inlet to the fuel pipe, substantially as described.

2. AneXplosive engine 'having a fuel inlet pipe provided with a charge former and an air inlet through which air is continuously sucked by the engine while running, and 'a thcrmostatic choke device having a part thereof located in saidair inlet and adjacent to the engine exhaustan'd in conductivev heat relation thereto additionally to an?) heating thereof from the air drawn in, said device controlling at all times the voiume of air sucked 4in through said air inlet, substantially as described.

- 3. An Yexplosive engine having a flowchannel connected therewith and through y which fluid is contginpously moved by 'the engine while running, and a .thermostat 'formed as a. choke device located Within said How-channel and continuously controlling the `flow of fluid therethrough while thi*J engine is running by the dierent positionings of `said ythermostatic device under the dif- -ferent temperatures to which it is subjected; 1

substantially as described.

In testimony whereof, have hereunto set my hand.

C. P. BYRNES. Witnesses: i

C. LYON, H. CORWIN. 

